Military radar indicates that the missing Boeing 777 jet may have turned back before vanishing, Malaysia's air force chief said.

Russian forces' seizure of the Black Sea peninsula has been bloodless but tensions are mounting.

By Niluksi Koswanage KUALA LUMPUR (Reuters) - Malaysian officials are poring over CCTV footage and questioning immigration officers and guards at Kuala Lumpur's international airport, concerned that a security breach may be connected to the disappearance of Malaysia Airlines flight MH370. Suspicions that the Beijing-bound Boeing jet, which vanished on Saturday with 239 people on board, may have been hijacked or bombed have risen after at least two passengers were found to be using stolen passports, though Malaysia's government stressed it was considering all possibilities. Malaysian investigators, assisted by the FBI, are probing the identities of four passengers in particular, two Malaysian officials with knowledge of the investigation told Reuters. The four comprise two travelers with European passports, possibly Ukrainian, in addition to two travelling on stolen Austrian and Italian passports, the sources said.

KIEV, Ukraine (AP) — As separatists in Crimea kept up pressure for unification with Moscow, Ukraine on Sunday solemnly commemorated the 200th anniversary of the birth of its greatest poet, with the prime minister vowing not to give up "a single centimeter" of Ukrainian territory.

TAHIRPUR, India (AP) — At first, Ashok Yadav ignored the patches of pink skin on his arm. But when pale sores erupted on his body and he lost sensation in his fingertips, a doctor issued the devastating diagnosis: Yadav had leprosy.

BAGHDAD (AP) — A suicide car bomber set off his explosive-laden vehicle at a security checkpoint Sunday in southern Iraq, the deadliest of a series of attacks that killed 42 people, officials said. The violence, which comes a few weeks before scheduled elections, is the latest by insurgents bent on destabilizing the country.